Planoqraph co



F. G. LYNDE.

MOTOR VALVE CONSTRUCTION.

APPLICATION, FILED SEPT.28, 1917.

Patented July 29, 1919.

i l lug INVENTOR W 6.? "QM my. ATTORNEY THE COLUMBIA PLANOGRAPH ccn,WASHINGTON, b. C.

. I Ap ilication filed-September 285191715 sieri'a jN- 1 3,65

of the engaging sur-facesi FRANK LY DE; 0F

FFICE.

NEWARKNEEW'JERSEY? WQRAH N OF NEW JERSEY- To all whom it may concern 7 gBe it known thatLjFnAN G, Linena citizen of the United States, residingin the city of Newark, county of Essex, and State of New J ersey,-l1aveinvented certain-new and useful Improvements -1n; Motor ValYeConstruction,- o'fhich the following isga p c 14 13"? 5;. 11*

v My invention relates in general to -a pneumatically actuated motor ofthe type particul-arly -designed for driving the take-up spool actuatingmechanism inplayer pianos and particularly {relates to improvements inthe slide valve's 1nsuchmotors;

v The efiiciency of these {motors obviously -depends,; among other; 1features; upon the e] iminatiori, as far as possible; of leakage of thepneumatic power; in its passage through the motor, 1 In the slidesabre-control: type of such motors it has been dlSCQVBLGtt that a largepercentage of this wasteful leakage occurs between the slideIolocls-anddts coacting guide plate.

The engaging faces of; the and the guide pl-ates @are .usually t ore aly .3 ould :n leak With careful wiforkmanship tl e;motors leavethefactories-wi 'ith little, ifany leakage 'at' this place but -a-f;ter thedeyic'e hasbe'endn usef'or a hilesome leakage develops presumablydue mla slight warping Theseesurt aces are preferably formed of wood-but in;order to elimina-tethis leakage attempts-have been made to form thesurface of different metals but this did not eliminate the leakage 1Accordingly one ofj the 3 objects of: ;this invention is to provide asimple for mof slide-valveginwhich the leaka-ge.,is: mini; niz d .e j iI i if .I= attain this obj ect; in {general tyg forming one of thesurfaces :in its. :conyentionali flat form and to design theother seemsso that it I may flex itself 1 and thus confmrm to. any slight 1irregularities 1 which may 2 develop theflat surface. I The slidingblock is usually fconnected to anactuating crank-shaft and it: :has:been found that this crankshaft, especially when operating; at the highspeed Lusual .With :such a -device,xhas=a tendency to set up ralwastemotion in: the slide. block Lwhich: tends. to cause the same to srockitransverselyl of its line of reciprocatory movementa.Hf v :,1 *Accordinglyp another object offthe in: vention incidental: to theageneral object f tov eon serire t Pet ee u y 29; [191 9.

he :pneum atic power is to. provide *a-type of; connection.-.between,the actuating .crankshaftsand the sliding block which willtend ;to {minimize the transmission ofi any Y otion otheinthan thatwhich.causes'ithe desiredjreciprocatory motion, 1,1.

--I; attain this 3 obj ectbroadly by "providing i a loose 1 connectionbel/When the 1 drive shaft and the sliding block, which" connection isdesigned to, permit of; the' connections without transmitting thisfrocking to i the) portion of the slide block Whichenga ges:the guideplate. I l 2 IV 1 Vanious other0b3ects and advantages of *theinyention-. ,will be {in ap art .ObIvious' from an inspection [of theaccompanying I draw,- ings: and in gpart Will he more fully [set forthin the follot vgingi particular description of one 1 form of 1 mechanismembodying. my nyention, nd; the 1 invention. also} consists in certainnew and novel features or, construcr i i Referring totheaccompanyin'gdrawings figure- 1 is a .frontviewl. inlelevation of aipneferre d embodiment ofqny invention with pantsabroken laivayltofshowinternal ,constructionfillf I in 1 I ,i 5 r;1

,. Eigvlg'is. a transverse sectional {v'iew taken smile use 2 3-2.ofFl-gll; 4.11 239 l A] FigLl; :is aivi ew" of th '-,'reaii side of a;form of slide block, slightly different rlt rom' the blockisliowlniniFigsQl' and 2; L1 j Fig. 4 is ;a 1ongitiidinal sectional gvi'ewthrough anotherformtof slide block; and Iv riLFig'sQ5l and B are "iiewsi'llustrating still another forrnof the slide .blockhnt. The motorincludes a supporting frame 10 within, the uprights E111: of. which; is.jourhaleda driven niulti-crank -shaft 12,; ;designed to beconnectediwithflm mechanism tozbe drivemsuchflas theftake-up spool inthe spool box (not shown) Tjhefinotorv illustrated .is a. six-point!motor "with the; pneumEatics arrangediin'pairs andOtherWise re sembling,lain v,its general: construction, [the front portion of the motonformingthe sub.- ject-lmatterz of i1iy.co-;pending application for pneumaticmotors," filed J un e'=1 6, 1 916, Serial N0.-1O3,9 l8.%"', I I Y 5fTheiinbton noper oomprises lal chamber 14 connected by the hose connection 16 to some suitable source of pneumatic power. 1 c V p In thedevice illustrated there is shown three pairs of pneumatics similar inconstruction so that the description of any one airwillbe suflicient forany other pair. J Describing any one pair of pneumatics and itscontrolling valvular mechanism it will be seen that a guide plate 17 isfixed to the front of the tension box and is provided,

with three parallel and; vertically. spaced ports communicating withpassageways extending into the board; "The middle port 18 opens directly'into the longitudinally extending windpassageWay 14 and theupsmoothouter face 26 constituting'the work-' ing face fora coacting'sliding block 27.

The slide block is mounted for reciprocatory movement vertically andlongitudinally on the outer face of its corresponding guide block. Thecontacting faces of the block and plate are made as fiat as ismechanically possible in the construction of the device.

The inner face of the slide block is provided with a pocket 28 havinga-dimension lengthwise, suflicient to cover the middle port 18 and oneof the end ports, 19 or depending upon the limiting position of theslide block in either of its reciprocatory directions, but this pocketis of a length-less than the length which would cover; the three portsin" the guide plate. The slide block is actuated by a depending valverod 29, the lower end of which is bent later'allyto form a' pivoting pin30 adapted to engage in'an aperture 31 in a plate 32] constitutin partof a connection with the crank-shaft '12 and arranged so that therotation of'the crank-shaft will reciprocate the slide iblock. Differentportions of that'face of theslide block which engage the guide plate areflexible relative to each other, so" that the slide block will tend toengage the. surface of'the guide plateeven though it may have becomewarped during use. i I One means of obtaining this flexibility is toform the blockof' two parts v,shown in Figs. 1 and 2, connected acrossthepocket', by means of any air'tightjointf33; Thisj'oint is preferably.a strip of. leather :connecting theadjacent faces of the parts of theblock, in such a manner that leakage will not oc-' cur through 'the' joint. This connection 1 is satisfactorily attained simply by gluingopposite sidesof a leather strip to the contiguous endsof the blockwhich has been sawed transversely across its center.

;The one-joint construction shown in Fig.

1 had worked satisfactorily, especially where a high suction pressure ismaintained in the tension passageway 14. It is understood of "coursethat the vacuum in this passageway tends to maintain the parts of thevalve block in close engagement-with the adjacent portions of the guideplate.

I is shown in Fig. 3, the block is similar to the block shown in Fig. 1,except that it is formed 'of fourparts with three joints 34 thusproviding agreater de ree of flexibility than .is present in the preerred form; i In Fig. 4 the block is formed of a flat cork composition34 with. fabric facings35 on oppo- "the'tension box and the other end ofwhich isjfree. This rod is'ofspring metal. and bearsgently on the backof the slide block, thus further tending to hold the same in closeengagement with the face of the guide plate. By'means of this f-reeendconstruction of the guide rod, it is possible to spring the rod out ofthe slot and'thus'quickly release the sliding block from its engagementwith the guide plate in caseit' is desired to replace the guide block orrefinish or lubricate the surfaceof the guide plate.

In order to minimize'any abnormal action of the crank shaft, or itsconnections, onthe portion ofthe slide block which engages the guideplate {the connection with the guide plate is preferably a looseconnection and for this purpose the portion of the block'containin theslot 36 is in the form" of alongitudina ly extending guide strip .37,v:QPPW

site longitudinal side portious of this strip are connectedby means of apair of leather buttons38 to opposite sides of theportion of the. blockengaging the. guideplate as shown in Fig. 2. ,'As shown in the form ofthemven'tion illustrated in Fig.- 4' theguide strip is fastenedcentrally to, the plate engaging portion by means of a single projection39; The lower end oftheguide strip is formed into a' pair of parallelproj ecting lugs '40'between which is support'ed a pivot pin 41 intowhich extends theupper end ofthe valve rod 29. A set screw 42 engagesthe Valverod to secure thesame-to the pin and-provides a means fora'djusting the} position of the rod relative tothe slide block; v a .5 Theslide block shownin Figs.i5 and dis connected directly-to the rod29*.without the 5 rocking connection shown in the other 1 rocated backand forth across the guide plate.

forms of-the slide block; :Whererthe crankshaft and its rconnectingmechanismvis f formediofshigh class'machine' work, ;therod 29 can .beconnected 'idirectlyi to the slide block without any material;:rockingeffect from the-crank-shaft. j '1 In operation; will beunderstood that lithe motor will operate ashas been described in detailin 1 my: cope-h ding; application above identified. -'In devicesequipped "with the flexible form of sliding blocksherein-disclosedthe-parts of theb'locks will: ride across the-face of the guideplate-with sufficient play "between theparts to cause the block toclosel-y adhere to th surface of the guide fplat'e even-thoughit maytie-warped. I-he flatenga i g su faces are maintained asex- "tensi vgraspossibleg so" to ihs reaany eas 'sliding-movementat the partsrdative toeach other and to reduce-the possibilit'yof the airpas'snig between theblock a v l-p-l'a'lte.i l t l fi a if 4lx'lf 1 Any inev'ement fthronghthe action of the not be tran' smitted tothe p 'block eng'aging he "de1' I "gliding blocknvihb reciproqfatory direction which direction itWhile T 'naveshowa" amnesia-Bed a e p nt d out in tha ne ed claimbe'understoodfth anwgmnissiens, 'siibstitutions a aen ngesjin tassel-inaadlue- 40 ans or the device illustrated and i its operation may be madeby those i slrilled in the art without departing from the spirit Havingthus described *my "mention;

claim:

1, In a pneumatic motor, the combination of a guide plate having aworking face provided with a plurality of openings therethrough, a slideblock mounted for reciprocatory movement and having a Working faceengaging said working face on the guide plate to control said aperturesand means for guiding the slide block parallel to said apertured workingface, one of said working faces being flexible thereby to adhere closelyto the other face as it is slid across the same and thus minimizeleakage between the faces.

2. In a pneumatic motor, the combination of a tension box, a guide platehaving a working face provided with an aperture opening therethrough andinto the tension box, a slide block mounted for reciprocatory .movementand having a working face engaging the working face on the guide plateito control said aperture, the working face of thei slide block beingflexible thereby to "adhere closely: to 'the working faceofthe 1 guideplate and thus minimize leakage between the faces-astthe slide block isrecip- 3. In-aipneumatic motor, the combination of awguide platehavinga'working face pro- ;vided I with 'an aperture opening Itherethrough, a slide block mounted for reciprocatory movement andhaving aWorkingface engaging saldworkingsfaceon the guide 4 plate: tocontrol said aperture, said block being-:formed of a plurality of partscoa acting -to';form the working facein parts movablerelative toizeachother during the movement 'ofthe block along the working fa'ce" of theguide plate; I

i r i 4; Irr apneumati mbtergithe combination" of a guide plate having a-working face provided' wrth an" aperture opening there- 'f ithroughgfa' slide block mounted for reciprocatory imovement andihaving a workingface engaging said": wo kin face 01i 1 the guide plate to control saidaperture, said blo'ck "being; formed of, a guaranty-pf parts" co- *cting'to form'the workingfa'ce in parts festive to each other during themovement off-the block eati g the working rate or the gra e p1ate;-' anda an naught -""joi -iitfor"fiexib1y c -enacting the eans. 1 5; Inapneumaue, mate the combination ;'with" tension: bar; a designed tonave-an fair pres'snre 'therinless' than atmesphencisrs too sure, of twovalve meihber's liav ing engaging "e samaateafw slide relativetoeachother,

er said vailve members having open- -111gseemingtheret reagn and Opentothe H low ttessarias ia tension e therebyfdn- -=s,t itutinpneumaticmeans acting "en-said members-melamine the same in sliding I enm nt ne of a d mem rs. nqhidins ,flexible' slidiri g surface adaisteaaecoinpensate for irregularities in the engaging faces of said members asthey slide relative to each other, said flexible surface acting tominimize leakage between the members during their relative slidingmovement.

6. In a pneumatic motor, the combination of two valve members havingengaging faces mounted to slide relative to each other, one of saidmembers having a pair of apertures extending therethrough, means forguiding said members relative to each other, pneumatic means acting onsaid members and tending to maintain the same in sliding engagement, oneof said members including means for compensating for irregularities inthe engaging faces of said members and thus minimizing leakage betweenthe members, a driving member and a flexible connection between saiddriving member and one of said valve members.

7. In a pneumatic motor, the combination copies of this patent may tjtmaea, for

of a member provided With a slide surface having an' aperture openingtherethrough, a block slldably mounted on sald surface .to

control said aperture, said block including two parts and a o1ntOOIIIIGCtIHg SZIId parts I whereby the parts are capable of relativemovement, sald joint extending transversely of the'line of travel of theblock. f

8. In a pneumatic motor,- the combination of a member provided 1th asurface having a; palrfof aperturesopenlng therethrough, a

a. block slidablymounted on said surface and provided with a pocketadapted, when, the block is in one position overthe aperture, to opensimultaneously to both of said apertures, said block being formed of twoparts, and a joint extending across the block at the pocket andconnecting said parts :whereby the part at one endof the pocketpossesses movement relative to the part at the other end of the pocket.v

9. In a pneumatic motor, the combination of a member provided withsurface having a palrof apertures openlng therethrough, a block slidablymounted on, said surfaceand guidestrip to. said-block, aguid rodengaging said strip to confinethe movement of said block in onedirectionand a connection between :shaft. I ,t i

- 11., In a device of the class described, the

saidguide strip and said crankcombination of acrank-shaft, a guide platea providedwith an aperture extending therethrough, a block slidablymounted on said plate to control-said. aperture, and means for connectingsaid block With said crankshaft, said means includinga universal conjnection With the" block whereby the sliding engagement of said block onthe guide plate combination of arpair of valvular members islidablerelative. to each other, a crank shaft 1 for causing saidrelativemovement, guiding means lncludmg a strip looselyconnected to providedwith a pocket adapted, when the .blockis in one position overtheaperture, to open simultaneously 'to bothof sa1dapertures, said blockbeing formed of two parts,

vand a joint extending across the block at fiexible means for loosely.connecting the one of. said valvular members, a guide rod engaglngsaldstrip to guide the'same, and a valve rod plvotally connectedto said strp and to said crank-shaft. v V v 7 13. 111 a.1devic e of the class.described,

thecombination of a pair of valvular members slldable relative toeachother, a crank shaft for causing said relative vmovement, a

, guiding strip loosely fastened to one of said members, said stripprovided witha guiding groove and a guiding, rod fixed in position anddisposed in said groove to confine the movement of the strip ;111 onedlrection, said strip beingfree tov rock about said rod as an I 7; ,1 aSigned atNeWark in the county of Essex and State of New Jersey thistwenty sixth day of September A; D. 1917.

FRANK e; LYNDEQ Witness: Q S. R.,CAIRNS.

five cents each, by addressing the commis'signeret Patents,

, Washington, 1X03 is not affected-by a. lateral IIHOVBIHBIIU of saidconnecting means. V 7

12. In adevice of the class'described, the

